Imaging optical lens assembly, imaging apparatus and electronic device

ABSTRACT

An imaging optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has negative refractive power. The third lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The fourth lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The fifth lens element with refractive power has both an object-side surface and an image-side surface being aspheric. The sixth lens element with refractive power has both an object-side surface and an image-side surface being aspheric.

RELATED APPLICATIONS

The present application is a continuation of the application Ser. No.15/822,582, filed Nov. 27, 2017, which is a continuation of theapplication Ser. No. 14/684,516, filed Apr. 13, 2015, U.S. Pat. No.9,857,559 issued on Jan. 2, 2018, which claims priority to TaiwanApplication Serial Number 103146323, filed Dec. 30, 2014, which isherein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to an imaging optical lens assembly andan imaging apparatus. More particularly, the present disclosure relatesto a compact imaging optical lens assembly and an imaging apparatuswhich is applicable to electronic devices.

Description of Related Art

In recent years, with the popularity of mobile terminals having camerafunctionalities, the demand of miniaturized optical systems has beenincreasing. The sensor of a conventional optical system is typically aCCD (Charge-Coupled Device) or a CMOS (ComplementaryMetal-Oxide-Semiconductor) sensor. As the advanced semiconductormanufacturing technologies have allowed the pixel size of sensors to bereduced and compact optical systems have gradually evolved toward thefield of higher megapixels, there is an increasing demand for compactoptical systems featuring better image quality.

Conventional constructions of telephoto optical systems are mainlyequipped with multiple spherical glass lens elements. The lens size ofthese systems becomes too large to carry, and the costs of manufacturingthese systems become too high. Hence, the conventional optical systemscannot satisfy these photographic requirements of convenience andmulti-functions.

SUMMARY

According to one aspect of the present disclosure, an imaging opticallens assembly includes, in order from an object side to an image side, afirst lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element and a sixth lens element. Thefirst lens element with positive refractive power has a convexobject-side surface. The second lens element has negative refractivepower. The third lens element with refractive power has both anobject-side surface and an image-side surface being aspheric. The fourthlens element with refractive power has both an object-side surface andan image-side surface being aspheric. The fifth lens element withrefractive power has both an object-side surface and an image-sidesurface being aspheric. The sixth lens element with refractive power hasboth an object-side surface and an image-side surface being aspheric.The imaging optical lens assembly has a total of six lens elements withrefractive power. There is an air gap between any two of the first lenselement, the second lens element, the third lens element, the fourthlens element, the fifth lens element and the sixth lens element that areadjacent to each other. There is no relative movement among the lenselements with refractive power thereof. The imaging optical lensassembly further comprises an aperture stop with no lens element havingrefractive power between the aperture stop and the first lens element.When a focal length of the imaging optical lens assembly is f, a maximumimage height of the imaging optical lens assembly is ImgH, a sum ofcentral thicknesses of the first lens element, the second lens element,the third lens element, the fourth lens element, the fifth lens elementand the sixth lens element is ΣCT, a sum of axial distances betweenevery two of the first lens element, the second lens element, the thirdlens element, the fourth lens element, the fifth lens element and thesixth lens element that are adjacent to each other is ΣAT, and an axialdistance between the aperture stop and the image-side surface of thesixth lens element is SD, the following conditions are satisfied:2.0<f/ImgH;0.90<(ΣCT+ΣAT)/SD<1.30; and1.55<(ΣCT+ΣAT)/ΣCT.

According to another aspect of the present disclosure, an imagingapparatus includes the imaging optical lens assembly according to theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the imaging optical lens assembly.

According to still another aspect of the present disclosure, anelectronic device includes the imaging apparatus according to theforegoing aspect.

According to yet another aspect of the present disclosure, an imagingoptical lens assembly includes, in order from an object side to an imageside, a first lens element, a second lens element, a third lens element,a fourth lens element, a fifth lens element and a sixth lens element.The first lens element with positive refractive power has a convexobject-side surface. The second lens element has negative refractivepower. The third lens element with refractive power has both anobject-side surface and an image-side surface being aspheric. The fourthlens element with refractive power has both an object-side surface andan image-side surface being aspheric. The fifth lens element withrefractive power has both an object-side surface and an image-sidesurface being aspheric. The sixth lens element with refractive power hasboth an object-side surface and an image-side surface being aspheric.The imaging optical lens assembly has a total of six lens elements withrefractive power. There is an air gap between any two of the first lenselement, the second lens element, the third lens element, the fourthlens element, the fifth lens element and the sixth lens element that areadjacent to each other. There is no relative movement among the lenselements with refractive power thereof. The imaging optical lensassembly further comprises an aperture stop with no lens element havingrefractive power between the aperture stop and an object. When a focallength of the imaging optical lens assembly is f, a maximum image heightof the imaging optical lens assembly is ImgH, a sum of centralthicknesses of the first lens element, the second lens element, thethird lens element, the fourth lens element, the fifth lens element andthe sixth lens element is ΣCT, a sum of axial distances between everytwo of the first lens element, the second lens element, the third lenselement, the fourth lens element, the fifth lens element and the sixthlens element that are adjacent to each other is ΣAT, and an axialdistance between the aperture stop and the image-side surface of thesixth lens element is SD, the following conditions are satisfied:2.0<f/ImgH; and0.90<(ΣCT+ΣAT)/SD<1.20.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be more fully understood by reading the followingdetailed description of the embodiments, with reference made to theaccompanying drawings as follows:

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 1stembodiment;

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 2ndembodiment;

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 3rdembodiment;

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 4thembodiment;

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 5thembodiment;

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 6thembodiment;

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 7thembodiment;

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 8thembodiment;

FIG. 17 is a schematic view of an imaging apparatus according to the 9thembodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 9thembodiment;

FIG. 19 is a schematic view of an imaging apparatus according to the10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 10thembodiment;

FIG. 21 shows a schematic view of the parameter SAG62 of the imagingoptical lens assembly of the imaging apparatus according to FIG. 1;

FIG. 22 shows an electronic device according to the 11th embodiment ofthe present disclosure;

FIG. 23 shows an electronic device according to the 12th embodiment ofthe present disclosure; and

FIG. 24 shows an electronic device according to the 13th embodiment ofthe present disclosure.

DETAILED DESCRIPTION

An imaging optical lens assembly includes, in order from an object sideto an image side, a first lens element, a second lens element, a thirdlens element, a fourth lens element, a fifth lens element and a sixthlens element. The imaging optical lens assembly has a total of six lenselements with refractive power.

According to the imaging optical lens assembly of the presentdisclosure, there is an air gap between any two of the first lenselement, the second lens element, the third lens element, the fourthlens element, the fifth lens element and the sixth lens element that areadjacent to each other, that is, each of the first through sixth lenselements of the imaging optical lens assembly is a single andnon-cemented lens element. Moreover, the manufacturing process of thecemented lenses is more complex than the non-cemented lenses. Inparticular, an image-side surface of one lens element and an object-sidesurface of the following lens element need to have accurate curvature toensure these two lens elements will be highly cemented. However, duringthe cementing process, those two lens elements might not be highlycemented due to displacement and it is thereby not favorable for theimage quality of the imaging optical lens assembly. Therefore, there isan air gap between any two of the first lens element, the second lenselement, the third lens element, the fourth lens element, the fifth lenselement and the sixth lens element that are adjacent to each other inthe present disclosure for resolving the problem generated by thecemented lens elements.

There is no relative movement among the lens elements with refractivepower of the imaging optical lens assembly. Therefore, it is favorablefor reducing the misalignment with the optical axis of each lens elementcaused by the relative movement among the lens elements.

The first lens element with positive refractive power has a convexobject-side surface and can have a concave image-side surface.Therefore, it is favorable for having the light gathering of the imagingoptical lens assembly on the object side so as to reduce a back focallength, maintain the compact size and reduce the astigmatism.

The second lens element with negative refractive power can have aconcave image-side surface. Therefore, it is favorable for adjusting thelight path of different bands so as to further focus the image point andcorrect the aberration of the imaging optical lens assembly.

The third lens element can have positive refractive power and have aconcave image-side surface. Therefore, it is favorable for effectivelyreducing the sensitivity of refractive power distribution.

The fourth lens element can have positive refractive power, and can havea concave object-side surface and a convex image-side surface.Therefore, it is favorable for effectively correcting the astigmatismand reducing the sensitivity of refractive power distribution.

The fifth lens element can have negative refractive power and have aconcave image-side surface. Therefore, it is favorable for effectivelycorrecting the astigmatism. Furthermore, the fifth lens element can havean object-side surface changing from a convex shape to a concave shapefrom a paraxial region thereof to an off-axis region thereof. Therefore,it is favorable for effectively correcting the off-axis aberration.

The sixth lens element can have negative refractive power, and can havea concave object-side surface and a convex image-side surface.Therefore, the principal point of the imaging optical lens assembly canbe positioned away from the image surface, and the back focal length canbe reduced so as to maintain the compact size of the imaging opticallens assembly.

Furthermore, at least one surface of at least one of the fifth lenselement and the sixth lens element has at least one inflection point.Therefore, it is favorable for effectively reducing the incident angleof off-axis so as to correct the off-axis aberration.

The imaging optical lens assembly further includes a stop, such as anaperture stop, and there is no lens element with refractive powerbetween the stop and the first lens element. Thus, the stop can bedisposed between the object and the first lens element, or between thefirst lens element and the second lens element. Therefore, it isfavorable for obtaining a longer distance between an exit pupil of theimaging optical lens assembly and the image surface so as to enhance thetelecentric effect and improve the image-sensing efficiency of an imagesensor.

When a focal length of the imaging optical lens assembly is f, and amaximum image height of the imaging optical lens assembly is ImgH, thefollowing condition is satisfied: 2.0<f/ImgH. Therefore, it is favorablefor enhancing the image capturing ability on a far specific region andobtaining the high resolution image while focusing on the far specificregion.

When a sum of central thicknesses of the first lens element, the secondlens element, the third lens element, the fourth lens element, the fifthlens element and the sixth lens element is ΣCT, a sum of axial distancesbetween every two of the first lens element, the second lens element,the third lens element, the fourth lens element, the fifth lens elementand the sixth lens element that are adjacent to each other is ΣAT, andan axial distance between the stop and the image-side surface of thesixth lens element is SD, the following condition is satisfied:0.90<(ΣCT+ΣAT)/SD<1.30. Therefore, it is favorable for balancing thetelephoto image quality and the space arrangement. Preferably, thefollowing condition is satisfied: 0.90<(ΣCT+ΣAT)/SD<1.20.

When the sum of central thicknesses of the first lens element, thesecond lens element, the third lens element, the fourth lens element,the fifth lens element and the sixth lens element is ΣCT, and the sum ofaxial distances between every two of the first lens element, the secondlens element, the third lens element, the fourth lens element, the fifthlens element and the sixth lens element that are adjacent to each otheris ΣAT, the following condition is satisfied: 1.55<(ΣCT+ΣAT)/ΣCT.Therefore, it is favorable for assembling the lens elements andmaintaining the compact size of the imaging optical lens assembly.

When an axial distance between the object-side surface of the first lenselement and the image surface is TL, and the focal length of the imagingoptical lens assembly is f, the following condition is satisfied:0.50<TL/f<1.15. Therefore, it is favorable for maintaining the compactsize of the imaging optical lens assembly. Preferably, the followingcondition is satisfied: 0.70<TL/f<1.05. More preferably, the followingcondition is satisfied: 0.70<TL/f<1.0.

When an Abbe number of the fourth lens element is V4, the followingcondition is satisfied: V4<30. Therefore, it is favorable for correctingthe chromatic aberration of the imaging optical lens assembly.

When the focal length of the imaging optical lens assembly is f, and acurvature radius of the object-side surface of the first lens element isR1, the following condition is satisfied: 3.0<f/R1. Therefore, it isfavorable for strengthening refractive power of the object side of theimaging optical lens assembly so as to enhance the resolution anddetails of a distant image.

When an axial distance between the fifth lens element and the sixth lenselement is T56, a central thickness of the first lens element is CT1, acentral thickness of the second lens element is CT2, a central thicknessof the third lens element is CT3, a central thickness of the fourth lenselement is CT4, a central thickness of the fifth lens element is CT5, acentral thickness of the sixth lens element is CT6, and a maximum valueamong CT1, CT2, CT3, CT4, CT5 and CT6 is CTmax, the following conditionis satisfied: 0.70<T56/CTmax. Therefore, it is favorable for properlyadjusting the axial distance and central thicknesses of the lenselements so as to obtain sufficient space for adjusting light beams andcorrect the high-order aberration and image bending.

When a half of a maximal field of view of the imaging optical lensassembly is HFOV, the following condition is satisfied: 7.5degrees<HFOV<23.5 degrees. Therefore, it is favorable for obtaining aproper field of view and an imaging scene.

When a distance in parallel with an optical axis from an axial vertex onthe image-side surface of the sixth lens element to a maximum effectiveradius position on the image-side surface of the sixth lens element isSAG62, and the central thickness of the sixth lens element is CT6, thefollowing condition is satisfied: SAG62+CT6<0 mm. Therefore, it isfavorable for effectively controlling the incident angle of off-axisonto the image surface so as to improve the photosensitivity of theimage sensor and reduce the image vignetting.

When a refractive index of the first lens element is N1, a refractiveindex of the second lens element is N2, a refractive index of the thirdlens element is N3, a refractive index of the fourth lens element is N4,a refractive index of the fifth lens element is N5, a refractive indexof the sixth lens element is N6, and a maximum value among N1, N2, N3,N4, N5 and N6 is Nmax, the following condition is satisfied: Nmax<1.70.Therefore, it is favorable for correcting the aberration.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and the maximum image heightof the imaging optical lens assembly is ImgH, the following condition issatisfied: 2.0<TL/ImgH<3.0. Therefore, it is favorable for controllingthe field of view and effectively reducing the total track length of theimaging optical lens assembly so as to maintain the compact sizethereof.

When the central thickness of the sixth lens element is CT6, and anaxial distance between the first lens element and the second lenselement is T12, the following condition is satisfied: 2<CT6/T12<30.Therefore, it is favorable for manufacturing and assembling the lenselements so as to increase the manufacturing yield rate.

When an Abbe number of the first lens element is V1, an Abbe number ofthe second lens element is V2, an Abbe number of the third lens elementis V3, the Abbe number of the fourth lens element is V4, an Abbe numberof the fifth lens element is V5, and an Abbe number of the sixth lenselement is V6, at least two of V1, V2, V3, V4, V5 and V6 are smallerthan 27. Therefore, it is favorable for correcting the chromaticaberration of the imaging optical lens assembly and maintaining theimage quality.

When a composite focal length of the first lens element and the secondlens element is f12, and a composite focal length of the third lenselement, the fourth lens element, the fifth lens element and the sixthlens element is f3456, the following condition is satisfied:f12/f3456<0.30. Therefore, it is favorable for properly distributingrefractive power of the object side and image side of the imagingoptical lens assembly so as to satisfy the requirements of theresolution of telephoto and the compact size thereof.

When a maximum effective radius of the object-side surface of the firstlens element is Y11, and a maximum effective radius of the image-sidesurface of the sixth lens element is Y62, the following condition issatisfied: 0.50<Y11/Y62<0.80. Therefore, it is favorable for reducingthe total track length of the imaging optical lens assembly andobtaining the efficient exposure so as to improve the image quality.

When the axial distance between the first lens element and the secondlens element is T12, an axial distance between the second lens elementand the third lens element is T23, an axial distance between the thirdlens element and the fourth lens element is T34, an axial distancebetween the fourth lens element and the fifth lens element is T45, andthe axial distance between the fifth lens element and the sixth lenselement is T56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56. Therefore, it isfavorable for arranging the lens elements so as to improve themanufacturing efficiency.

According to the imaging optical lens assembly of the presentdisclosure, the lens elements thereof can be made of plastic or glassmaterial. When the lens elements are made of plastic material, themanufacturing cost can be effectively reduced. When the lens elementsare made of glass material, the arrangement of the refractive power ofthe imaging optical lens assembly may be more flexible to design.Furthermore, surfaces of each lens element can be arranged to beaspheric, since the aspheric surface of the lens element is easy to forma shape other than spherical surface so as to have more controllablevariables for eliminating the aberration thereof, and to furtherdecrease the required number of the lens elements. Therefore, the totaltrack length of the imaging optical lens assembly can also be reduced.

According to the imaging optical lens assembly of the presentdisclosure, each of an object-side surface and an image-side surface hasa paraxial region and an off-axis region. The paraxial region refers tothe region of the surface where light rays travel close to the opticalaxis, and the off-axis region refers to the region of the surface awayfrom the paraxial region. Particularly, when the lens element has aconvex surface, it indicates that the surface is convex in the paraxialregion thereof; when the lens element has a concave surface, itindicates that the surface is concave in the paraxial region thereof.Furthermore, when the lens element has positive refractive power ornegative refractive power, it indicates that the lens element hasrefractive power in the paraxial region thereof. When the lens elementhas a focal length, it indicates that the lens element has a focallength in the paraxial region thereof.

According to the imaging optical lens assembly of the presentdisclosure, the image surface, depending on the corresponding imagesensor, can be a plane surface or a curved surface with any curvature.When the image surface is a curved surface, it is particularly indicatesa concave surface toward the object side.

According to the imaging optical lens assembly of the presentdisclosure, an aperture stop can be configured as a front stop or amiddle stop. A front stop disposed between an imaged object and thefirst lens element can provide a longer distance between an exit pupilof the imaging optical lens assembly and the image surface and therebyimproves the image-sensing efficiency of an image sensor. A middle stopdisposed between the first lens element and the image surface isfavorable for enlarging the field of view of the imaging optical lensassembly and thereby provides a wider field of view for the same.

According to the imaging optical lens assembly of the presentdisclosure, the imaging optical lens assembly can include at least onestop, such as an aperture stop, a glare stop or a field stop. The glarestop or the field stop is for eliminating the stray light and therebyimproving the image resolution thereof.

According to the imaging optical lens assembly of the presentdisclosure, the imaging optical lens assembly is featured with goodcorrection ability and high image quality, and can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart TVs, networkmonitoring devices, motion sensing input devices, driving recorders,rear view camera systems, wearable devices and other electronic imagingproducts.

According to the present disclosure, an imaging apparatus is provided.The imaging apparatus includes the aforementioned imaging optical lensassembly according to the present disclosure and an image sensor,wherein the image sensor is disposed on or near an image surface of theaforementioned imaging optical lens assembly. In the imaging opticallens assembly of the imaging apparatus, it is favorable for properlyadjusting the distribution of refractive power of the first lens elementand the second lens element so as to prevent having excessively largesize of the imaging optical lens assembly and provide a better focus ofthe telephoto image. Moreover, it is favorable for arranging the stopand the first lens element so as to increase the distance between anexit pupil of the imaging optical lens assembly and the image surface,thereby enhancing the telecentric effect and the image-sensingefficiency of the image sensor. Preferably, the imaging apparatus canfurther include a barrel member, a holder member or a combinationthereof.

According to the present disclosure, an electronic device is provided,wherein the electronic device includes the aforementioned imagingapparatus. Therefore, it is favorable for telephoto shooting,arrangement of the lens elements and designs of the surface shapes so asto satisfy the requirements of resolution of telephoto and the compactsize thereof. Preferably, the electronic device can further include butnot limited to a control unit, a display, a storage unit, a randomaccess memory unit (RAM) or a combination thereof.

According to the above description of the present disclosure, thefollowing 1st-13th specific embodiments are provided for furtherexplanation.

1st Embodiment

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure. FIG. 2 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 1stembodiment.

In FIG. 1, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 190. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 100, a first lens element 110, a secondlens element 120, a third lens element 130, a fourth lens element 140, afifth lens element 150, a sixth lens element 160, an IR-cut filter 170and an image surface 180. The image sensor 190 is disposed on the imagesurface 180 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (110-160) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 110, the second lens element 120, the third lens element 130,the fourth lens element 140, the fifth lens element 150, and the sixthlens element 160 that are adjacent to each other and there is norelative movement among the lens elements (110-160) with refractivepower.

The first lens element 110 with positive refractive power has a convexobject-side surface 111 and a concave image-side surface 112. The firstlens element 110 is made of plastic material and has both theobject-side surface 111 and the image-side surface 112 being aspheric.

The second lens element 120 with negative refractive power has a convexobject-side surface 121 and a concave image-side surface 122. The secondlens element 120 is made of plastic material and has both theobject-side surface 121 and the image-side surface 122 being aspheric.

The third lens element 130 with positive refractive power has a convexobject-side surface 131 and a concave image-side surface 132. The thirdlens element 130 is made of plastic material and has both theobject-side surface 131 and the image-side surface 132 being aspheric.

The fourth lens element 140 with positive refractive power has a concaveobject-side surface 141 and a convex image-side surface 142. The fourthlens element 140 is made of plastic material and has both theobject-side surface 141 and the image-side surface 142 being aspheric.

The fifth lens element 150 with negative refractive power has a convexobject-side surface 151 and a concave image-side surface 152. The fifthlens element 150 is made of plastic material and has both theobject-side surface 151 and the image-side surface 152 being aspheric.Furthermore, the object-side surface 151 of the fifth lens element 150has at least one inflection point. The object-side surface 151 of thefifth lens element 150 changes from a convex shape to a concave shapefrom a paraxial region thereof to an off-axis region thereof.

The sixth lens element 160 with negative refractive power has a concaveobject-side surface 161 and a convex image-side surface 162. The sixthlens element 160 is made of plastic material and has both theobject-side surface 161 and the image-side surface 162 being aspheric.Furthermore, the object-side surface 161 of the sixth lens element 160has at least one inflection point.

The IR-cut filter 170 is made of glass material and located between thesixth lens element 160 and the image surface 180, and will not affectthe focal length of the imaging optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{\prime} \right)}}}},$

where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from the optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a focal length of the imaging optical lensassembly is f, an f-number of the imaging optical lens assembly is Fno,and half of a maximal field of view of the imaging optical lens assemblyis HFOV, these parameters have the following values: f=5.96 mm;Fno=2.60; and HFOV=20.0 degrees.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when an Abbe number of the fourth lens element140 is V4, the following condition is satisfied: V4=23.3.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a refractive index of the first lens element110 is N1, a refractive index of the second lens element 120 is N2, arefractive index of the third lens element 130 is N3, a refractive indexof the fourth lens element 140 is N4, a refractive index of the fifthlens element 150 is N5, a refractive index of the sixth lens element 160is N6, and a maximum value among N1, N2, N3, N4, N5 and N6 is Nmax, thefollowing condition is satisfied: Nmax=1.640.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a central thickness of the sixth lenselement 160 is CT6, and an axial distance between the first lens element110 and the second lens element 120 is T12, the following condition issatisfied: CT6/T12=14.10.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when an axial distance between the fifth lenselement 150 and the sixth lens element 160 is T56, a central thicknessof the first lens element 110 is CT1, a central thickness of the secondlens element 120 is CT2, a central thickness of the third lens element130 is CT3, a central thickness of the fourth lens element 140 is CT4, acentral thickness of the fifth lens element 150 is CT5, the centralthickness of the sixth lens element 160 is CT6, and a maximum valueamong CT1, CT2, CT3, CT4, CT5 and CT6 is CTmax, the following conditionis satisfied: T56/CTmax=2.03.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when the focal length of the imaging optical lensassembly is f, and a curvature radius of the object-side surface 111 ofthe first lens element 110 is R1, the following condition is satisfied:f/R1=4.05.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when the focal length of the imaging optical lensassembly is f, and a maximum image height of the imaging optical lens Joassembly is ImgH (half of a diagonal length of an effectivephotosensitive area of the image sensor 190), the following conditionsis satisfied: f/ImgH=2.67.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a composite focal length of the first lenselement 110 and the second lens element 120 is f12, and a compositefocal length of the third lens element 130, the fourth lens element 140,the fifth lens element 150 and the sixth lens element 160 is f3456, thefollowing condition is satisfied: f12/f3456=−0.41.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a maximum effective radius of theobject-side surface 111 of the first lens element 110 is Y11, and amaximum effective radius of the image-side surface 162 of the sixth lenselement 160 is Y62, the following condition is satisfied: Y11/Y62=0.66.

FIG. 21 shows a schematic view of the parameter SAG62 of the imagingoptical lens assembly of the imaging apparatus according to FIG. 1. InFIG. 21, when a distance in parallel with the optical axis from an axialvertex on the image-side surface 162 of the sixth lens element 160 to amaximum effective radius position on the image-side surface 162 of thesixth lens element 160 is SAG62 (SAG62 is a negative value with thedistance in parallel with the optical axis towards the object side;SAG62 is a positive value with the distance in parallel with the opticalaxis towards the image side), and the central thickness of the sixthlens element 160 is CT6, the following condition is satisfied:SAG62+CT6=−0.34 mm.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when a sum of central thicknesses of the firstlens element 110, the second lens element 120, the third lens element130, the fourth lens element 140, the fifth lens element 150 and thesixth lens element 160 is ΣCT, a sum of axial distances between everytwo of the first lens element 110, the second lens element 120, thethird lens element 130, the fourth lens element 140, the fifth lenselement 150 and the sixth lens element 160 that are adjacent to eachother is ΣAT, and an axial distance between the aperture stop 100 andthe image-side surface 162 of the sixth lens element 160 is SD, thefollowing conditions is satisfied: (ΣCT+ΣAT)/SD=1.13.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when the sum of central thicknesses of the firstlens element 110, the second lens element 120, the third lens element130, the fourth lens element 140, the fifth lens element 150 and thesixth lens element 160 is ΣCT, and the sum of axial distances betweenevery two of the first lens element 110, the second lens element 120,the third lens element 130, the fourth lens element 140, the fifth lenselement 150 and the sixth lens element 160 that are adjacent to eachother is ΣAT, the following conditions is satisfied: (ΣCT+ΣAT)/ΣCT=1.92.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when an axial distance between the object-sidesurface 111 of the first lens element 110 and the image surface 180 isTL, and the focal length of the imaging optical lens assembly is f, thefollowing condition is satisfied: TL/f=0.89.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when the axial distance between the object-sidesurface 111 of the first lens element 110 and the image surface 180 isTL, and the maximum image height of the imaging optical lens assembly isImgH, the following condition is satisfied: TL/ImgH=2.39.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when an Abbe number of the first lens element 110is V1, an Abbe number of the second lens element 120 is V2, an Abbenumber of the third lens element 130 is V3, the Abbe number of thefourth lens element 140 is V4, an Abbe number of the fifth lens element150 is V5, and an Abbe number of the sixth lens element 160 is V6, two(V2=23.3 and V4=23.3) of V1, V2, V3, V4, V5 and V6 are smaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 1st embodiment, when the axial distance between the first lenselement 110 and the second lens element 120 is T12, an axial distancebetween the second lens element 120 and the third lens element 130 isT23, an axial distance between the third lens element 130 and the fourthlens element 140 is T34, an axial distance between the fourth lenselement 140 and the fifth lens element 150 is T45, and the axialdistance between the fifth lens element 150 and the sixth lens element160 is T56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 1st embodiment are shown in TABLE 1 andthe aspheric surface data are shown in TABLE 2 below.

TABLE 1 1st Embodiment f = 5.96 mm, Fno = 2.60, HFOV = 20.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.520  2 Lens 1 1.470 ASP 0.724Plastic 1.544 55.9 3.06 3 10.314 ASP 0.040 4 Lens 2 13.861 ASP 0.230Plastic 1.640 23.3 −4.18 5 2.225 ASP 0.213 6 Lens 3 2.184 ASP 0.367Plastic 1.544 55.9 8.71 7 3.808 ASP 0.416 8 Lens 4 −5.078 ASP 0.282Plastic 1.640 23.3 9.04 9 −2.763 ASP 0.082 10 Lens 5 2.661 ASP 0.250Plastic 1.544 55.9 −4.39 11 1.218 ASP 1.469 12 Lens 6 −2.550 ASP 0.564Plastic 1.544 55.9 −9.39 13 −5.490 ASP 0.200 14 IR-cut filter Plano0.248 Glass 1.517 64.2 — 15 Plano 0.247 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  1.9460E−01 5.0000E+01 −1.6068E+01 −1.3294E+01  −9.1291E+00 −1.8655E+00 A4=−7.1745E−03 −8.4996E−02 −1.7160E−01 −5.6189E−02  −8.5960E−02 −6.9795E−02A6= −1.3657E−02  1.3690E−01  3.6558E−01 2.4124E−01  6.8717E−03−7.8050E−02 A8=  4.2785E−02 −4.7390E−02 −2.9545E−01 −1.9055E−01 −9.9892E−03  4.9883E−02 A10= −8.9690E−02 −1.5905E−01 −3.5146E−035.9696E−02  6.7751E−02  6.0343E−03 A12=  7.9306E−02  1.9358E−01 1.6061E−01 3.7867E−02 −3.6768E−02 −2.8121E−02 A14= −2.9319E−02−6.5167E−02 −6.4322E−02 3.3392E−02  3.3756E−02  6.8361E−03 Surface # 8 910 11 12 13 k= 1.2565E+01 1.3525E+00 −5.0000E+01 −8.6049E+00 −1.0000E+00  3.1952E+00 A4= 1.4312E−01 1.2711E−01 −2.5156E−01−5.9708E−02  −8.3429E−02 −1.4058E−01 A6= −4.1327E−01  −2.5818E−01  1.1497E−01 6.3295E−02  2.6635E−02  4.6297E−02 A8= 4.0174E−01 1.0637E−01−5.8806E−02 2.6270E−02 −8.8252E−04 −7.5781E−03 A10= −4.5780E−01 −8.4257E−02   1.4106E−02 −3.5400E−02   6.0690E−04 −1.3933E−04 A12=1.0455E−01 2.5202E−02  2.0375E−02 1.0639E−03  1.0922E−04  1.0766E−04A14= 4.1473E−02 1.9252E−02 −2.2911E−02 4.0078E−03 −8.3472E−05−3.3106E−07

In TABLE 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-16 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In TABLE 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A14 represent the asphericcoefficients ranging from the 4th order to the 14th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as TABLE 1 and TABLE 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided to again.

2nd Embodiment

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure. FIG. 4 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 2ndembodiment.

In FIG. 3, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 290. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 200, a first lens element 210, a secondlens element 220, a third lens element 230, a fourth lens element 240, afifth lens element 250, a sixth lens element 260, an IR-cut filter 270and an image surface 280. The image sensor 290 is disposed on the imagesurface 280 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (210-260) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 210, the second lens element 220, the third lens element 230,the fourth lens element 240, the fifth lens element 250, and the sixthlens element 260 that are adjacent to each other and there is norelative movement among the lens elements (210-260) with refractivepower.

The first lens element 210 with positive refractive power has a convexobject-side surface 211 and a concave image-side surface 212. The firstlens element 210 is made of plastic material and has both theobject-side surface 211 and the image-side surface 212 being aspheric.

The second lens element 220 with negative refractive power has a convexobject-side surface 221 and a concave image-side surface 222. The secondlens element 220 is made of plastic material and has both theobject-side surface 221 and the image-side surface 222 being aspheric.

The third lens element 230 with positive refractive power has a convexobject-side surface 231 and a concave image-side surface 232. The thirdlens element 230 is made of plastic material and has both theobject-side surface 231 and the image-side surface 232 being aspheric.

The fourth lens element 240 with positive refractive power has a concaveobject-side surface 241 and a convex image-side surface 242. The fourthlens element 240 is made of plastic material and has both theobject-side surface 241 and the image-side surface 242 being aspheric.

The fifth lens element 250 with negative refractive power has a convexobject-side surface 251 and a concave image-side surface 252. The fifthlens element 250 is made of plastic material and has both theobject-side surface 251 and the image-side surface 252 being aspheric.Furthermore, the object-side surface 251 of the fifth lens element 250has at least one inflection point. The object-side surface 251 of thefifth lens element 250 changes from a convex shape to a concave shapefrom a paraxial region thereof to an off-axis region thereof.

The sixth lens element 260 with negative refractive power has a concaveobject-side surface 261 and a convex image-side surface 262. The sixthlens element 260 is made of plastic material and has both theobject-side surface 261 and the image-side surface 262 being aspheric.Furthermore, the object-side surface 261 of the sixth lens element 260has at least one inflection point.

The IR-cut filter 270 is made of glass material and located between thesixth lens element 260 and the image surface 280, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 2nd embodiment, when an Abbe number of thefirst lens element 210 is V1, an Abbe number of the second lens element220 is V2, an Abbe number of the third lens element 230 is V3, an Abbenumber of the fourth lens element 240 is V4, an Abbe number of the fifthlens element 250 is V5, and an Abbe number of the sixth lens element 260is V6, two (V2=23.3 and V4=23.3) of V1, V2, V3, V4, V5 and V6 aresmaller than 27.

The detailed optical data of the 2nd embodiment are shown in TABLE 3 andthe aspheric surface data are shown in TABLE 4 below.

TABLE 3 2nd Embodiment f = 6.07 mm, Fno = 2.40, HFOV = 22.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.469  2 Lens 1 1.856 ASP 0.694Plastic 1.544 55.9 3.99 3 11.180 ASP 0.077 4 Lens 2 18.112 ASP 0.230Plastic 1.640 23.3 −6.58 5 3.398 ASP 0.368 6 Lens 3 4.073 ASP 0.592Plastic 1.544 55.9 11.43 7 11.198 ASP 0.901 8 Lens 4 −2.540 ASP 0.338Plastic 1.640 23.3 58.81 9 −2.503 ASP 0.030 10 Lens 5 2.595 ASP 0.435Plastic 1.544 55.9 −33.25 11 2.136 ASP 0.706 12 Lens 6 −3.863 ASP 0.431Plastic 1.544 55.9 −8.71 13 −21.734 ASP 0.475 14 IR-cut filter Plano0.285 Glass 1.517 64.2 — 15 Plano 0.609 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  1.7378E−01−1.0000E+00  5.0000E+01 −1.7548E+01 −1.0073E+00 −3.5173E+00 A4=−2.2843E−03 −5.1227E−02 −1.1750E−01 −4.9402E−02 −8.0771E−02 −4.3747E−02A6= −5.4466E−03  6.7566E−02  1.8145E−01  1.1190E−01 −2.1948E−03−2.8477E−02 A8=  1.6515E−02 −1.8551E−02 −1.1029E−01 −6.9735E−02−3.9664E−03  1.0613E−02 A10= −2.5082E−02 −4.5702E−02 −3.2424E−04 2.0478E−02  1.5094E−02  1.4782E−03 A12=  1.6995E−02  4.1245E−02 3.4657E−02  7.3267E−03 −1.2059E−02 −2.8401E−03 A14= −5.0445E−03−1.0730E−02 −1.0908E−02 −1.4475E−04  5.7860E−03  1.1588E−03 Surface # 89 10 11 12 13 k= −1.2659E+00 1.8214E−01 −1.2613E+01 −9.4963E+00−8.5912E+00 −1.2603E+01 A4=  1.5739E−01 8.3586E−02 −1.4953E−01−5.3190E−02 −3.4194E−02 −3.7245E−02 A6= −2.2709E−01 −8.8761E−02  4.0819E−02  6.1885E−03  1.0457E−02  5.8712E−03 A8=  1.6973E−014.8741E−02 −1.6126E−02  1.1721E−02 −7.3614E−04 −1.3906E−03 A10=−1.0303E−01 −2.4788E−02   5.1557E−03 −5.6278E−03  8.7954E−05  5.6291E−05A12=  2.9620E−02 6.0066E−03 −8.0000E−04  9.2690E−04  1.5610E−05−1.9796E−06 A14= −2.0459E−03 −5.2468E−05  −4.9155E−04 −3.6645E−05−2.3279E−06 −1.0960E−07

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 asthe following values and satisfy the following conditions:

2nd Embodiment f (mm) 6.07 f/ImgH 2.43 Fno 2.40 f12/f3456 −0.08 HFOV(deg.) 22.0 Y11Y62 0.67 V4 23.3 SAG62 + CT6 (mm) −0.08 Nmax 1.640 (ΣCT +ΣAT)/SD 1.11 CT6/T12 5.60 (ΣCT + ΣAT)/ΣCT 1.77 T56/CTmax 1.02 TL/f 1.02f/R1 3.27 TL/ImgH 2.47

3rd Embodiment

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure. FIG. 6 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 3rdembodiment.

In FIG. 5, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 390. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 300, a first lens element 310, a secondlens element 320, a third lens element 330, a fourth lens element 340, afifth lens element 350, a sixth lens element 360, an IR-cut filter 370and an image surface 380. The image sensor 390 is disposed on the imagesurface 380 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (310-360) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 310, the second lens element 320, the third lens element 330,the fourth lens element 340, the fifth lens element 350, and the sixthlens element 360 that are adjacent to each other and there is norelative movement among the lens elements (310-360) with refractivepower.

The first lens element 310 with positive refractive power has a convexobject-side surface 311 and a concave image-side surface 312. The firstlens element 310 is made of plastic material and has both theobject-side surface 311 and the image-side surface 312 being aspheric.

The second lens element 320 with negative refractive power has a convexobject-side surface 321 and a concave image-side surface 322. The secondlens element 320 is made of plastic material and has both theobject-side surface 321 and the image-side surface 322 being aspheric.

The third lens element 330 with positive refractive power has a convexobject-side surface 331 and a concave image-side surface 332. The thirdlens element 330 is made of plastic material and has both theobject-side surface 331 and the image-side surface 332 being aspheric.

The fourth lens element 340 with positive refractive power has a convexobject-side surface 341 and a convex image-side surface 342. The fourthlens element 340 is made of plastic material and has both theobject-side surface 341 and the image-side surface 342 being aspheric.

The fifth lens element 350 with negative refractive power has a convexobject-side surface 351 and a concave image-side surface 352. The fifthlens element 350 is made of plastic material and has both theobject-side surface 351 and the image-side surface 352 being aspheric.Furthermore, both of the object-side surface 351 and the image-sidesurface 352 of the fifth lens element 350 have at least one inflectionpoint. The object-side surface 351 of the fifth lens element 350 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 360 with negative refractive power has a concaveobject-side surface 361 and a concave image-side surface 362. The sixthlens element 360 is made of plastic material and has both theobject-side surface 361 and the image-side surface 362 being aspheric.Furthermore, the image-side surface 362 of the sixth lens element 360has at least one inflection point.

The IR-cut filter 370 is made of glass material and located between thesixth lens element 360 and the image surface 380, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 3rd embodiment, when an Abbe number of thefirst lens element 310 is V1, an Abbe number of the second lens element320 is V2, an Abbe number of the third lens element 330 is V3, an Abbenumber of the fourth lens element 340 is V4, an Abbe number of the fifthlens element 350 is V5, and an Abbe number of the sixth lens element 360is V6, two (V2=23.3 and V4=23.3) of V1, V2, V3, V4, V5 and V6 aresmaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 3rd embodiment, when an axial distance between the first lenselement 310 and the second lens element 320 is T12, an axial distancebetween the second lens element 320 and the third lens element 330 isT23, an axial distance between the third lens element 330 and the fourthlens element 340 is T34, an axial distance between the fourth lenselement 340 and a fifth lens element 350 is T45, and the axial distancebetween the fifth lens element 350 and the sixth lens element 360 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 3rd embodiment are shown in TABLE 5 andthe aspheric surface data are shown in TABLE 6 below.

TABLE 5 3rd Embodiment f = 6.07 mm, Fno = 2.40, HFOV = 22.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.481  2 Lens 1 1.861 ASP 0.704Plastic 1.544 55.9 4.13 3 9.374 ASP 0.062 4 Lens 2 9.904 ASP 0.230Plastic 1.640 23.3 −6.10 5 2.773 ASP 0.405 6 Lens 3 2.924 ASP 0.606Plastic 1.544 55.9 17.68 7 3.893 ASP 0.690 8 Lens 4 662.205 ASP 0.256Plastic 1.640 23.3 58.06 9 −39.348 ASP 0.110 10 Lens 5 1.535 ASP 0.342Plastic 1.544 55.9 −117.41 11 1.381 ASP 1.376 12 Lens 6 −10.997 ASP0.449 Plastic 1.544 55.9 −11.68 13 15.281 ASP 0.300 14 IR-cut filterPlano 0.285 Glass 1.517 64.2 — 15 Plano 0.356 16 Image Plano — Note:Reference wavelength is 587.6 nm (d-line).

TABLE 6 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  2.2333E−01−1.0000E+00  4.9704E+01 −1.1690E+01 −2.9767E−02 −5.3252E+00 A4=−4.4841E−04 −4.0080E−02 −1.1481E−01 −3.2068E−02 −7.6879E−02 −4.3387E−02A6= −7.8204E−03  7.0544E−02  1.8150E−01  1.1619E−01  1.2464E−02−2.2171E−02 A8=  1.9163E−02 −2.0424E−02 −1.1074E−01 −7.0774E−02−4.2649E−03  1.5203E−02 A10= −2.5934E−02 −4.6911E−02 −2.2582E−03 2.0078E−02  1.1291E−02 −4.9124E−04 A12=  1.6056E−02  4.1157E−02 3.3399E−02  7.0100E−03 −1.2367E−02 −5.6099E−03 A14= −4.4250E−03−1.0395E−02 −1.0292E−02 −9.6895E−04  5.0173E−03  2.4788E−03 Surface # 89 10 11 12 13 k= −5.0000E+01 −1.4079E+01  −4.3881E+00 −3.3508E+00−1.0000E+00 −5.0000E+01 A4=  1.4352E−01 7.6047E−02 −1.4369E−01−9.8487E−02 −6.7196E−02 −7.1444E−02 A6= −2.0305E−01 −9.8651E−02  1.3565E−02  7.7099E−03  1.3477E−02  1.0519E−02 A8=  1.6955E−015.8988E−02 −1.3275E−02  1.1459E−02 −1.4277E−03 −1.4535E−03 A10=−1.0000E−01 −2.2166E−02   8.0197E−03 −5.3996E−03  1.7355E−05  1.1041E−04A12=  3.4502E−02 4.3706E−03 −1.8793E−03  9.5782E−04  3.9541E−05 6.5097E−08 A14= −4.5652E−03 3.3138E−04 −2.6672E−04 −4.3261E−05−3.7683E−06 −1.4125E−06

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 5 and TABLE 6 asthe following values and satisfy the following conditions:

3rd Embodiment f (mm) 6.07 f/ImgH 2.43 Fno 2.40 f12/f3456 0.11 HFOV(deg.) 22.0 Y11/Y62 0.62 V4 23.3 SAG62 + CT6 (mm) −0.25 Nmax 1.640(ΣCT + ΣAT)/SD 1.10 CT6/T12 7.24 (ΣCT + ΣAT)/ΣCT 2.02 T56/CTmax 1.95TL/f 1.02 f/R1 3.26 TL/ImgH 2.47

4th Embodiment

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure. FIG. 8 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 4thembodiment.

In FIG. 7, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 490. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 400, a first lens element 410, a secondlens element 420, a third lens element 430, a fourth lens element 440, afifth lens element 450, a sixth lens element 460, an IR-cut filter 470and an image surface 480. The image sensor 490 is disposed on the imagesurface 480 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (410-460) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 410, the second lens element 420, the third lens element 430,the fourth lens element 440, the fifth lens element 450, and the sixthlens element 460 that are adjacent to each other and there is norelative movement among the lens elements (410-460) with refractivepower.

The first lens element 410 with positive refractive power has a convexobject-side surface 411 and a concave image-side surface 412. The firstlens element 410 is made of plastic material and has both theobject-side surface 411 and the image-side surface 412 being aspheric.

The second lens element 420 with negative refractive power has a convexobject-side surface 421 and a concave image-side surface 422. The secondlens element 420 is made of plastic material and has both theobject-side surface 421 and the image-side surface 422 being aspheric.

The third lens element 430 with positive refractive power has a convexobject-side surface 431 and a concave image-side surface 432. The thirdlens element 430 is made of plastic material and has both theobject-side surface 431 and the image-side surface 432 being aspheric.

The fourth lens element 440 with positive refractive power has a concaveobject-side surface 441 and a convex image-side surface 442. The fourthlens element 440 is made of plastic material and has both theobject-side surface 441 and the image-side surface 442 being aspheric.

The fifth lens element 450 with negative refractive power has a convexobject-side surface 451 and a concave image-side surface 452. The fifthlens element 450 is made of plastic material and has both theobject-side surface 451 and the image-side surface 452 being aspheric.Furthermore, both of the object-side surface 451 and the image-sidesurface 452 of the fifth lens element 450 have at least one inflectionpoint. The object-side surface 451 of the fifth lens element 450 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 460 with negative refractive power has a concaveobject-side surface 461 and a convex image-side surface 462. The sixthlens element 460 is made of plastic material and has both theobject-side surface 461 and the image-side surface 462 being aspheric.Furthermore, the object-side surface 461 of the sixth lens element 460has at least one inflection point.

The IR-cut filter 470 is made of glass material and located between thesixth lens element 460 and the image surface 480, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 4th embodiment, when an Abbe number of thefirst lens element 410 is V1, an Abbe number of the second lens element420 is V2, an Abbe number of the third lens element 430 is V3, an Abbenumber of the fourth lens element 440 is V4, an Abbe number of the fifthlens element 450 is V5, and an Abbe number of the sixth lens element 460is V6, three (V2=23.3, V4=21.4 and V6=21.4) of V1, V2, V3, V4, V5 and V6are smaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 4th embodiment, when an axial distance between the first lenselement 410 and the second lens element 420 is T12, an axial distancebetween the second lens element 420 and the third lens element 430 isT23, an axial distance between the third lens element 430 and the fourthlens element 440 is T34, an axial distance between the fourth lenselement 440 and a fifth lens element 450 is T45, and the axial distancebetween the fifth lens element 450 and the sixth lens element 460 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 4th embodiment are shown in TABLE 7 andthe aspheric surface data are shown in TABLE 8 below.

TABLE 7 4th Embodiment f = 6.75 mm, Fno = 2.60, HFOV = 20.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.507  2 Lens 1 1.835 ASP 0.734Plastic 1.544 55.9 3.49 3 45.643 ASP 0.051 4 Lens 2 12.513 ASP 0.230Plastic 1.639 23.5 −5.39 5 2.682 ASP 0.379 6 Lens 3 6.769 ASP 0.491Plastic 1.535 55.7 21.98 7 15.548 ASP 0.318 8 Lens 4 −18.982 ASP 0.304Plastic 1.650 21.4 14.40 9 −6.307 ASP 0.200 10 Lens 5 1.671 ASP 0.230Plastic 1.535 55.7 −8.67 11 1.169 ASP 2.224 12 Lens 6 −2.533 ASP 0.299Plastic 1.650 21.4 −9.96 13 4.355 ASP 0.300 14 IR-cut filter Plano 0.285Glass 1.517 64.2 — 15 Plano 0.203 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  1.2596E−01−1.0000E+00  5.0000E+01 −6.7314E+00 9.2963E+00 −4.0457E+01 A4=−2.8799E−04 −3.3261E−02 −9.9567E−02 −2.5714E−02 −1.6535E−02  −2.6025E−02A6= −1.3309E−02  8.4736E−02  1.8198E−01  1.1508E−01 3.1761E−02−2.1431E−02 A8=  2.4365E−02 −1.9405E−02 −1.0901E−01 −7.4308E−02−1.4777E−03   3.0201E−02 A10= −2.5891E−02 −5.0215E−02 −3.6966E−03 2.0047E−02 6.7774E−03 −4.4171E−03 A12=  1.3832E−02  4.0309E−02 3.1215E−02  1.0601E−02 −7.0068E−03  −1.4514E−02 A14= −3.4429E−03−9.4700E−03 −8.9112E−03 −3.9518E−03 1.4524E−03  4.9649E−03 Surface # 8 910 11 12 13 k= 4.0451E+01 1.4096E+01 −7.5169E+00 −4.6130E+00 −2.8151E+00 3.0008E+00 A4= 6.4209E−02 6.0062E−02 −2.4726E−01−1.6188E−01  −8.0876E−02 −8.5266E−02  A6= −1.9999E−01  −1.3610E−01  4.5228E−02 4.6699E−02  1.7365E−02 2.3127E−02 A8= 1.5497E−01 5.8528E−02−2.6939E−02 1.3031E−02 −1.3021E−03 −3.3035E−03  A10= −9.9971E−02 −1.5917E−02   5.0002E−04 −1.3123E−02   1.9333E−04 4.9053E−04 A12=3.3689E−02 5.6644E−03  1.3810E−02 2.8642E−03  1.2486E−04 −2.6989E−05 A14= −2.4741E−03  −6.1617E−04  −8.9917E−03 4.0047E−05 −2.5616E−055.3533E−06

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 7 and TABLE 8 asthe following values and satisfy the following conditions:

4th Embodiment f (mm) 6.75 f/ImgH 2.70 Fno 2.60 f12/f3456 −0.54 HFOV(deg.) 20.0 Y11/Y62 0.67 V4 21.4 SAG62 + CT6 (mm) −0.59 Nmax 1.650(ΣCT + ΣAT)/SD 1.10 CT6/T12 5.86 (ΣCT + ΣAT)/ΣCT 2.39 T56/CTmax 3.03TL/f 0.93 f/R1 3.68 TL/ImgH 2.50

5th Embodiment

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure. FIG. 10 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 5thembodiment.

In FIG. 9, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 590. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 500, a first lens element 510, a secondlens element 520, a third lens element 530, a fourth lens element 540, afifth lens element 550, a sixth lens element 560, an IR-cut filter 570and an image surface 580. The image sensor 590 is disposed on the imagesurface 580 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (510-560) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 510, the second lens element 520, the third lens element 530,the fourth lens element 540, the fifth lens element 550, and the sixthlens element 560 that are adjacent to each other and there is norelative movement among the lens elements (510-560) with refractivepower.

The first lens element 510 with positive refractive power has a convexobject-side surface 511 and a concave image-side surface 512. The firstlens element 510 is made of plastic material and has both theobject-side surface 511 and the image-side surface 512 being aspheric.

The second lens element 520 with negative refractive power has a convexobject-side surface 521 and a concave image-side surface 522. The secondlens element 520 is made of plastic material and has both theobject-side surface 521 and the image-side surface 522 being aspheric.

The third lens element 530 with positive refractive power has a convexobject-side surface 531 and a concave image-side surface 532. The thirdlens element 530 is made of plastic material and has both theobject-side surface 531 and the image-side surface 532 being aspheric.

The fourth lens element 540 with negative refractive power has a concaveobject-side surface 541 and a convex image-side surface 542. The fourthlens element 540 is made of plastic material and has both theobject-side surface 541 and the image-side surface 542 being aspheric.

The fifth lens element 550 with positive refractive power has a convexobject-side surface 551 and a concave image-side surface 552. The fifthlens element 550 is made of plastic material and has both theobject-side surface 551 and the image-side surface 552 being aspheric.Furthermore, both of the object-side surface 551 and the image-sidesurface 552 of the fifth lens element 550 have at least one inflectionpoint. The object-side surface 551 of the fifth lens element 550 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 560 with negative refractive power has a concaveobject-side surface 561 and a convex image-side surface 562. The sixthlens element 560 is made of plastic material and has both theobject-side surface 561 and the image-side surface 562 being aspheric.Furthermore, the object-side surface 561 of the sixth lens element 560has at least one inflection point.

The IR-cut filter 570 is made of glass material and located between thesixth lens element 560 and the image surface 580, and will not affectthe focal length of the imaging optical lens assembly.

In the imaging optical lens assembly of the imaging apparatus accordingto the 5th embodiment, when an axial distance between the first lenselement 510 and the second lens element 520 is T12, an axial distancebetween the second lens element 520 and the third lens element 530 isT23, an axial distance between the third lens element 530 and the fourthlens element 540 is T34, an axial distance between the fourth lenselement 540 and a fifth lens element 550 is T45, and the axial distancebetween the fifth lens element 550 and the sixth lens element 560 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<m T34<T56.

The detailed optical data of the 5th embodiment are shown in TABLE 9 andthe aspheric surface data are shown in TABLE 10 below.

TABLE 9 5th Embodiment f = 5.42 mm, Fno = 2.40, HFOV = 22.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.418  2 Lens 1 1.655 ASP 0.601Plastic 1.535 55.7 3.94 3 6.736 ASP 0.071 4 Lens 2 10.246 ASP 0.230Plastic 1.650 21.4 −6.84 5 3.071 ASP 0.598 6 Lens 3 1.631 ASP 0.551Plastic 1.544 55.9 7.15 7 2.473 ASP 0.549 8 Lens 4 −2.305 ASP 0.200Plastic 1.544 55.9 −33.76 9 −2.717 ASP 0.200 10 Lens 5 3.315 ASP 0.238Plastic 1.544 55.9 1006.78 11 3.251 ASP 0.632 12 Lens 6 −1.804 ASP 0.806Plastic 1.535 55.7 −4.90 13 −6.679 ASP 0.300 14 IR-cut filter Plano0.210 Glass 1.517 64.2 — 15 Plano 0.147 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  4.3616E−01−1.0000E+00  1.3577E+01 −1.2145E+01 −2.9240E+00 −1.0000E+00 A4=−1.2220E−02 −8.8410E−02 −1.7082E−01 −8.0685E−02 −1.5974E−02 −7.4788E−02A6= −2.3220E−02  1.5973E−01  3.5830E−01  2.5427E−01  1.8284E−02−5.3216E−02 A8=  5.7066E−02 −6.1857E−02 −2.7622E−01 −2.0426E−01−2.7264E−02  2.6338E−02 A10= −9.6752E−02 −1.6488E−01 −7.0033E−03 5.3188E−02  5.5564E−02 −4.0540E−05 A12=  6.7099E−02  2.0231E−01 1.3979E−01  5.1809E−02 −4.6149E−02 −2.0941E−02 A14= −1.9418E−02−6.8664E−02 −5.8961E−02 −3.1468E−02  1.6014E−02  1.3043E−02 Surface # 89 10 11 12 13 k= 1.4461E+00 1.8665E+00 −5.0000E+01 −4.7148E+01−1.2183E+00  4.0930E+00 A4= 1.6807E−01 9.3275E−02 −3.5624E−01−2.9584E−01 −1.2495E−01  −1.3358E−01  A6= −3.9083E−01  −1.5366E−01  4.4013E−02  5.6045E−02 1.5797E−02 4.5014E−02 A8= 4.5244E−01 1.8712E−01−3.2451E−02  1.1562E−02 1.5745E−03 −8.0235E−03  A10= −3.5241E−01 −7.7037E−02   3.9325E−02 −1.4446E−02 5.8587E−03 −5.7257E−04  A12=1.4616E−01 1.3536E−02  2.9391E−03  1.5624E−02 −1.5646E−02  3.8901E−05A14= −3.5575E−02  −1.3044E−02  −7.4786E−03 −1.7771E−03 7.3600E−037.0461E−05

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 9 and TABLE 10as the following values and satisfy the following conditions:

5th Embodiment f (mm) 5.42 f/ImgH 2.43 Fno 2.40 f12/f3456 −0.20 HFOV(deg.) 22.0 Y11/Y62 0.65 V4 55.9 SAG62 + CT6 (mm) −0.06 Nmax 1.650(ΣCT + ΣAT)/SD 1.10 CT6/T12 11.35 (ΣCT + ΣAT)/ΣCT 1.78 T56/CTmax 0.78TL/f 0.98 f/R1 3.27 TL/ImgH 2.39

6th Embodiment

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure. FIG. 12 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 6thembodiment.

In FIG. 11, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 690. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 600, a first lens element 610, a secondlens element 620, a third lens element 630, a fourth lens element 640, afifth lens element 650, a sixth lens element 660, an IR-cut filter 670and an image surface 680. The image sensor 690 is disposed on the imagesurface 180 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (610-660) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 610, the second lens element 620, the third lens element 630,the fourth lens element 640, the fifth lens element 650, and the sixthlens element 660 that are adjacent to each other and there is norelative movement among the lens elements (610-660) with refractivepower.

The first lens element 610 with positive refractive power has a convexobject-side surface 611 and a convex image-side surface 612. The firstlens element 610 is made of plastic material and has both theobject-side surface 611 and the image-side surface 612 being aspheric.

The second lens element 620 with negative refractive power has a concaveobject-side surface 621 and a concave image-side surface 622. The secondlens element 620 is made of plastic material and has both theobject-side surface 621 and the image-side surface 622 being aspheric.

The third lens element 630 with positive refractive power has a convexobject-side surface 631 and a concave image-side surface 632. The thirdlens element 630 is made of plastic material and has both theobject-side surface 631 and the image-side surface 632 being aspheric.

The fourth lens element 640 with negative refractive power has a concaveobject-side surface 641 and a convex image-side surface 642. The fourthlens element 640 is made of plastic material and has both theobject-side surface 641 and the image-side surface 642 being aspheric.

The fifth lens element 650 with positive refractive power has a convexobject-side surface 651 and a concave image-side surface 652. The fifthlens element 650 is made of plastic material and has both theobject-side surface 651 and the image-side surface 652 being aspheric.Furthermore, both of the object-side surface 651 and the image-sidesurface 652 of the fifth lens element 650 have at least one inflectionpoint. The object-side surface 651 of the fifth lens element 650 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 660 with negative refractive power has a concaveobject-side surface 661 and a convex image-side surface 662. The sixthlens element 660 is made of plastic material and has both theobject-side surface 661 and the image-side surface 662 being aspheric.Furthermore, the object-side surface 661 of the sixth lens element 660has at least one inflection point.

The IR-cut filter 670 is made of glass material and located between thesixth lens element 660 and the image surface 680, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 6th embodiment, when an Abbe number of thefirst lens element 610 is V1, an Abbe number of the second lens element620 is V2, an Abbe number of the third lens element 630 is V3, an Abbenumber of the fourth lens element 640 is V4, an Abbe number of the fifthlens element 650 is V5, and an Abbe number of the sixth lens element 660is V6, two (V2=25.6 and V4=21.4) of V1, V2, V3, V4, V5 and V6 aresmaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 6th embodiment, when an axial distance between the first lenselement 610 and the second lens element 620 is T12, an axial distancebetween the second lens element 620 and the third lens element 630 isT23, an axial distance between the third lens element 630 and the fourthlens element 640 is T34, an axial distance between the fourth lenselement 640 and a fifth lens element 650 is T45, and the axial distancebetween the fifth lens element 650 and the sixth lens element 660 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 6th embodiment are shown in TABLE 11and the aspheric surface data are shown in TABLE 12 below.

TABLE 11 6th Embodiment f = 5.15 mm, Fno = 2.50, HFOV = 23.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.336  2 Lens 1 1.644 ASP 0.634Plastic 1.530 55.8 2.98 3 −34.117 ASP 0.057 4 Lens 2 −64.185 ASP 0.230Plastic 1.614 25.6 −4.94 5 3.188 ASP 0.315 6 Lens 3 4.626 ASP 0.503Plastic 1.530 55.8 15.60 7 10.109 ASP 0.703 8 Lens 4 −2.203 ASP 0.352Plastic 1.650 21.4 −146.24 9 −2.397 ASP 0.020 10 Lens 5 1.806 ASP 0.391Plastic 1.530 55.8 139.42 11 1.712 ASP 0.891 12 Lens 6 −1.837 ASP 0.330Plastic 1.530 55.8 −7.02 13 −3.854 ASP 0.300 14 IR-cut filter Plano0.260 Glass 1.517 64.2 — 15 Plano 0.315 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  1.2654E−01−1.0000E+00 −5.0000E+01 −1.9659E+01 −1.0000E+01 −2.8463E+01 A4=−2.4927E−03 −8.6248E−02 −1.7159E−01 −6.9235E−02 −1.1597E−01 −7.1597E−02A6= −1.8464E−02  1.3957E−01  3.6160E−01  2.2052E−01  1.1107E−02−4.8755E−02 A8=  4.5709E−02 −4.7487E−02 −2.9257E−01 −1.9288E−01−6.7357E−03  2.4864E−02 A10= −8.7140E−02 −1.6203E−01  2.7957E−04 7.5139E−02  4.2751E−02  1.5568E−03 A12=  7.6571E−02  1.8948E−01 1.6079E−01  3.7867E−02 −5.9113E−02 −1.5567E−02 A14= −3.3550E−02−6.6977E−02 −6.8773E−02 −9.7848E−03  4.2349E−02  9.6223E−03 Surface # 89 10 11 12 13 k= −7.0155E−01 5.1647E−01 −6.7710E+00 −7.6443E+00−2.9201E+00  3.3329E−01 A4=  2.2368E−01 1.0506E−01 −2.1298E−01−8.8842E−02 −6.0816E−02  −4.1518E−02  A6= −4.6445E−01 −1.7474E−01  8.5405E−02  9.3693E−03 2.2988E−02 1.4491E−02 A8=  4.5149E−01 1.3238E−01−4.0498E−02  3.1194E−02 −1.5438E−03  −4.0663E−03  A10= −3.6106E−01−8.6280E−02   1.5625E−02 −1.9359E−02 2.2878E−04 1.0786E−04 A12= 1.3584E−01 2.9434E−02 −5.4203E−03  4.4252E−03 4.4273E−05 −1.6217E−05 A14= −1.7714E−02 −2.7244E−03  −7.2865E−04 −2.9371E−04 4.4629E−077.5068E−06

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 11 and TABLE 12as the following values and satisfy the following conditions:

6th Embodiment f (mm) 5.15 f/ImgH 2.31 Fno 2.50 f12/f3456 −0.30 HFOV(deg.) 23.0 Y11/Y62 0.60 V4 21.4 SAG62 + CT6 (mm) −0.35 Nmax 1.650 (ΣCT+ΣAT)/SD 1.08 CT6/T12 5.79 (ΣCT + ΣAT)/ΣCT 1.81 T56/CTmax 1.41 TL/f 1.03f/R1 3.14 TL/ImgH 2.38

7th Embodiment

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure. FIG. 14 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 7thembodiment.

In FIG. 13, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 790. Theimaging optical lens assembly includes, in order from an object side toan image side, a first lens element 710, an aperture stop 700, a secondlens element 720, a third lens element 730, a fourth lens element 740, afifth lens element 750, a sixth lens element 760, an IR-cut filter 770and an image surface 780. The image sensor 790 is disposed on the imagesurface 780 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (710-760) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 710, the second lens element 720, the third lens element 730,the fourth lens element 740, the fifth lens element 750, and the sixthlens element 760 that are adjacent to each other and there is norelative movement among the lens elements (710-760) with refractivepower.

The first lens element 710 with positive refractive power has a convexobject-side surface 711 and a convex image-side surface 712. The firstlens element 710 is made of plastic material and has both theobject-side surface 711 and the image-side surface 712 being aspheric.

The second lens element 720 with negative refractive power has a concaveobject-side surface 721 and a concave image-side surface 722. The secondlens element 720 is made of plastic material and has both theobject-side surface 721 and the image-side surface 722 being aspheric.

The third lens element 730 with negative refractive power has a convexobject-side surface 731 and a concave image-side surface 732. The thirdlens element 730 is made of plastic material and has both theobject-side surface 731 and the image-side surface 732 being aspheric.

The fourth lens element 740 with positive refractive power has a convexobject-side surface 741 and a convex image-side surface 742. The fourthlens element 740 is made of plastic material and has both theobject-side surface 741 and the image-side surface 742 being aspheric.

The fifth lens element 750 with negative refractive power has a convexobject-side surface 751 and a concave image-side surface 752. The fifthlens element 750 is made of plastic material and has both theobject-side surface 751 and the image-side surface 752 being aspheric.Furthermore, both of the object-side surface 751 and the image-sidesurface 752 of the fifth lens element 750 have at least one inflectionpoint. The object-side surface 751 of the fifth lens element 750 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 760 with negative refractive power has a concaveobject-side surface 761 and a convex image-side surface 762. The sixthlens element 760 is made of plastic material and has both theobject-side surface 761 and the image-side surface 762 being aspheric.Furthermore, the object-side surface 761 of the sixth lens element 760has at least one inflection point.

The IR-cut filter 770 is made of glass material and located between thesixth lens element 760 and the image surface 780, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 7th embodiment, when an Abbe number of thefirst lens element 710 is V1, an Abbe number of the second lens element720 is V2, an Abbe number of the third lens element 730 is V3, an Abbenumber of the fourth lens element 740 is V4, an Abbe number of the fifthlens element 750 is V5, and an Abbe number of the sixth lens element 760is V6, two (V2=25.6 and V4=25.7) of V1, V2, V3, V4, V5 and V6 aresmaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 7th embodiment, when an axial distance between the first lenselement 710 and the second lens element 720 is T12, an axial distancebetween the second lens element 720 and the third lens element 730 isT23, an axial distance between the third lens element 730 and the fourthlens element 740 is T34, an axial distance between the fourth lenselement 740 and a fifth lens element 750 is T45, and the axial distancebetween the fifth lens element 750 and the sixth lens element 760 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 7th embodiment are shown in TABLE 13and the aspheric surface data are shown in TABLE 14 below.

TABLE 13 7th Embodiment f = 7.34 mm, Fno = 2.65, HFOV = 18.5 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 1.894 ASP 0.872 Plastic 1.535 56.3 3.12 2−11.754 ASP 0.030 3 Ape. Stop Plano 0.024 4 Lens 2 −77.548 ASP 0.230Plastic 1.614 25.6 −3.92 5 2.487 ASP 0.317 6 Lens 3 5.500 ASP 0.340Plastic 1.535 56.3 −60.34 7 4.597 ASP 0.241 8 Lens 4 11.705 ASP 0.468Plastic 1.608 25.7 8.25 9 −8.638 ASP 0.179 10 Lens 5 1.714 ASP 0.230Plastic 1.544 55.9 −10.62 11 1.259 ASP 2.748 12 Lens 6 −2.638 ASP 0.304Plastic 1.535 56.3 −15.40 13 −4.037 ASP 0.300 14 IR-cut filter Plano0.300 Glass 1.517 64.2 — 15 Plano 0.248 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 14 Aspheric Coefficients Surface # 1 2 4 5 6 7 k=  1.3548E−01−1.0000E+00 −5.0000E+01 −4.7830E+00  −1.0000E+00 −1.4447E+01 A4=−1.3365E−03 −1.5478E−02 −6.7159E−02 −7.5782E−03  −4.3670E−02 −4.3815E−02A6= −7.3293E−03  5.0418E−02  1.2146E−01 7.4770E−02  2.9576E−02−1.9454E−02 A8=  1.1371E−02 −9.7175E−03 −6.3978E−02 −4.2395E−02 −2.9239E−03  2.3540E−02 A10= −1.1736E−02 −2.2992E−02 −1.8916E−031.1770E−02  5.8726E−03  2.3400E−03 A12=  6.1517E−03  1.5264E−02 1.3861E−02 3.9561E−03 −1.3121E−03 −6.7124E−03 A14= −1.5286E−03−2.9579E−03 −3.2776E−03 7.1360E−04 −5.4848E−04 −5.8719E−04 Surface # 8 910 11 12 13 k= −3.4725E+01 2.0000E+01 −5.0891E+00 −3.9429E+00−5.6805E+00 −3.3676E+00 A4=  6.9614E−02 5.5000E−02 −2.3314E−01−1.6325E−01 −5.1096E−02 −3.5467E−02 A6= −1.3617E−01 −9.3344E−02  3.0438E−02  5.0934E−02  1.1568E−02  5.9971E−03 A8=  8.6542E−022.5083E−02  4.7505E−04  1.4832E−02 −2.2538E−03 −1.7044E−03 A10=−4.7114E−02 −2.5731E−03  −1.3566E−03 −7.2769E−03  2.8861E−05  3.7451E−04A12=  1.8130E−02 2.8081E−03  9.2896E−03 −8.1351E−04  1.3986E−04−4.8938E−05 A14= −4.6189E−03 −1.3237E−03  −4.6847E−03  4.9716E−04−1.6635E−05  5.0114E−06

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 13 and TABLE 14as the following values and satisfy the following conditions:

7th Embodiment f (mm) 7.34 f/ImgH 2.94 Fno 2.65 f12/f3456 −0.29 HFOV(deg.) 18.5 Y11/Y62 0.69 V4 25.7 SAG62 + CT6 (mm) −0.55 Nmax 1.614(ΣCT + ΣAT)/SD 1.18 CT6/T12 5.63 (ΣCT + ΣAT)/ΣCT 2.45 T56/CTmax 3.15TL/f 0.93 f/R1 3.88 TL/ImgH 2.73

8th Embodiment

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure. FIG. 16 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 8thembodiment.

In FIG. 15, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 890. Theimaging optical lens assembly includes, in order from an object side toan image side, an aperture stop 800, a first lens element 810, a secondlens element 820, a third lens element 830, a fourth lens element 840, afifth lens element 850, a sixth lens element 860, an IR-cut filter 870and an image surface 880. The image sensor 890 is disposed on the imagesurface 880 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (810-860) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 810, the second lens element 820, the third lens element 830,the fourth lens element 840, the fifth lens element 850, and the sixthlens element 860 that are adjacent to each other and there is norelative movement among the lens elements (810-860) with refractivepower.

The first lens element 810 with positive refractive power has a convexobject-side surface 811 and a concave image-side surface 812. The firstlens element 810 is made of plastic material and has both theobject-side surface 811 and the image-side surface 812 being aspheric.

The second lens element 820 with negative refractive power has a convexobject-side surface 821 and a concave image-side surface 822. The secondlens element 820 is made of plastic material and has both theobject-side surface 821 and the image-side surface 822 being aspheric.

The third lens element 830 with positive refractive power has a convexobject-side surface 831 and a concave image-side surface 832. The thirdlens element 830 is made of plastic material and has both theobject-side surface 831 and the image-side surface 832 being aspheric.

The fourth lens element 840 with negative refractive power has a concaveobject-side surface 841 and a convex image-side surface 842. The fourthlens element 840 is made of plastic material and has both theobject-side surface 841 and the image-side surface 842 being aspheric.

The fifth lens element 850 with negative refractive power has a convexobject-side surface 851 and a concave image-side surface 852. The fifthlens element 850 is made of plastic material and has both theobject-side surface 851 and the image-side surface 852 being aspheric.Furthermore, both of the object-side surface 851 and the image-sidesurface 852 of the fifth lens element 850 have at least one inflectionpoint. The object-side surface 851 of the fifth lens element 850 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 860 with positive refractive power has a convexobject-side surface 861 and a convex image-side surface 862. The sixthlens element 860 is made of plastic material and has both theobject-side surface 861 and the image-side surface 862 being aspheric.Furthermore, the object-side surface 861 of the sixth lens element 860has at least one inflection point.

The IR-cut filter 870 is made of glass material and located between thesixth lens element 860 and the image surface 880, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 8th embodiment, when an Abbe number of thefirst lens element 810 is V1, an Abbe number of the second lens element820 is V2, an Abbe number of the third lens element 830 is V3, an Abbenumber of the fourth lens element 840 is V4, an Abbe number of the fifthlens element 850 is V5, and an Abbe number of the sixth lens element 860is V6, three (V2=23.3, V4=23.3 and V6=23.3) of V1, V2, V3, V4, V5 and V6are smaller than 27.

The detailed optical data of the 8th embodiment are shown in TABLE 15and the aspheric surface data are shown in TABLE 16 below.

TABLE 15 8th Embodiment f = 6.37 mm, Fno = 2.80, HFOV = 17.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.514  2 Lens 1 1.457 ASP 0.716Plastic 1.544 55.9 2.96 3 12.474 ASP 0.064 4 Lens 2 14.903 ASP 0.230Plastic 1.640 23.3 −5.36 5 2.770 ASP 0.110 6 Lens 3 2.626 ASP 0.364Plastic 1.544 55.9 12.88 7 3.993 ASP 0.494 8 Lens 4 −2.426 ASP 0.220Plastic 1.640 23.3 −86.25 9 −2.627 ASP 0.450 10 Lens 5 2.969 ASP 0.230Plastic 1.544 55.9 −3.52 11 1.132 ASP 1.162 12 Lens 6 31.423 ASP 0.732Plastic 1.640 23.3 35.12 13 −78.128 ASP 0.300 14 IR-cut filter Plano0.248 Glass 1.517 64.2 — 15 Plano 0.143 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 16 Aspheric Coefficients Surface # 2 3 4 5 6 7 k=  1.9802E−01−1.0000E+00 5.0000E+01 −1.9639E+01  −1.0000E+00 −2.1192E+00 A4=−8.0099E−03 −7.6883E−02 −1.7868E−01  −8.8066E−02  −1.3207E−01−4.9263E−02 A6= −1.6001E−02  1.4821E−01 3.5910E−01 2.1239E−01 3.5258E−02 −1.1283E−01 A8=  4.4456E−02 −4.6828E−02 −2.9209E−01 −1.8604E−01  −1.1265E−02  6.4287E−02 A10= −8.9641E−02 −1.6173E−012.2248E−03 8.4454E−02  6.8727E−02  5.4697E−03 A12=  7.8626E−02 1.9180E−01 1.6403E−01 4.8885E−02 −2.3754E−02 −5.2041E−02 A14=−2.9994E−02 −6.3300E−02 −6.7745E−02  7.2581E−03  2.0157E−02  1.8733E−02Surface # 8 9 10 11 12 13 k= 3.0982E+00 2.5114E−01 −5.0000E+01−6.8815E+00 −9.0000E+01 −5.0000E+01 A4= 9.8721E−02 1.6646E−01−3.2465E−01 −1.5612E−01 −5.5455E−02 −1.2931E−01 A6= −4.2039E−01 −3.1764E−01   7.4450E−02  4.9819E−02  3.9917E−02  5.2352E−02 A8=3.3086E−01 1.2945E−01 −1.0440E−01  3.1516E−03 −8.0167E−03 −7.8884E−03A10= −4.5116E−01  −2.0511E−02  −2.2109E−02 −2.4433E−02 −1.9292E−04 6.8734E−04 A12= 2.6965E−01 2.7247E−02  2.2105E−03  1.6808E−02 3.0708E−04 −8.9048E−05 A14= 5.2062E−02 2.2749E−02 −4.6883E−03−3.6805E−03 −3.6479E−05  4.0997E−06

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 15 and TABLE 16as the following values and satisfy the following conditions:

8th Embodiment f (mm) 6.37 f/ImgH 3.18 Fno 2.80 f12/f3456 −0.79 HFOV(deg.) 17.0 Y11/Y62 0.62 V4 23.3 SAG62 + CT6 (mm) 0.42 Nmax 1.640 (ΣCT +ΣAT)/SD 1.12 CT6/T12 11.44 (ΣCT + ΣAT)/ΣCT 1.91 T56/CTmax 1.59 TL/f 0.86f/R1 4.37 TL/ImgH 2.73

9th Embodiment

FIG. 17 is a schematic view of an imaging apparatus according to the 9thembodiment of the present disclosure. FIG. 18 shows, in order from leftto right, spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 9thembodiment.

In FIG. 17, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 990. Theimaging optical lens assembly includes, in order from an object side toan image side, a first lens element 910, an aperture stop 900, a secondlens element 920, a third lens element 930, a fourth lens element 940, afifth lens element 950, a sixth lens element 960, an IR-cut filter 970and an image surface 980. The image sensor 990 is disposed on the imagesurface 980 of the imaging optical lens assembly. The imaging opticallens assembly has a total of six lens elements (910-960) with refractivepower. Moreover, there is an air gap between any two of the first lenselement 910, the second lens element 920, the third lens element 930,the fourth lens element 940, the fifth lens element 950, and the sixthlens element 960 that are adjacent to each other and there is norelative movement among the lens elements (910-960) with refractivepower.

The first lens element 910 with positive refractive power has a convexobject-side surface 911 and a concave image-side surface 912. The firstlens element 910 is made of plastic material and has both theobject-side surface 911 and the image-side surface 912 being aspheric.

The second lens element 920 with negative refractive power has a convexobject-side surface 921 and a concave image-side surface 922. The secondlens element 920 is made of plastic material and has both theobject-side surface 921 and the image-side surface 922 being aspheric.

The third lens element 930 with positive refractive power has a convexobject-side surface 931 and a concave image-side surface 932. The thirdlens element 930 is made of plastic material and has both theobject-side surface 931 and the image-side surface 932 being aspheric.

The fourth lens element 940 with positive refractive power has a concaveobject-side surface 941 and a convex image-side surface 942. The fourthlens element 940 is made of plastic material and has both theobject-side surface 941 and the image-side surface 942 being aspheric.

The fifth lens element 950 with negative refractive power has a convexobject-side surface 951 and a concave image-side surface 952. The fifthlens element 950 is made of plastic material and has both theobject-side surface 951 and the image-side surface 952 being aspheric.Furthermore, both of the object-side surface 951 and the image-sidesurface 952 of the fifth lens element 950 have at least one inflectionpoint. The object-side surface 951 of the fifth lens element 950 changesfrom a convex shape to a concave shape from a paraxial region thereof toan off-axis region thereof.

The sixth lens element 960 with negative refractive power has a concaveobject-side surface 961 and a convex image-side surface 962. The sixthlens element 960 is made of plastic material and has both theobject-side surface 961 and the image-side surface 962 being aspheric.

The IR-cut filter 970 is made of glass material and located between thesixth lens element 960 and the image surface 980, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 9th embodiment, when an Abbe number of thefirst lens element 910 is V1, an Abbe number of the second lens element920 is V2, an Abbe number of the third lens element 930 is V3, an Abbenumber of the fourth lens element 940 is V4, an Abbe number of the fifthlens element 950 is V5, and an Abbe number of the sixth lens element 960is V6, two (V2=23.3 and V4=23.3) of V1, V2, V3, V4, V5 and V6 aresmaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 9th embodiment, when an axial distance between the first lenselement 910 and the second lens element 920 is T12, an axial distancebetween the second lens element 920 and the third lens element 930 isT23, an axial distance between the third lens element 930 and the fourthlens element 940 is T34, an axial distance between the fourth lenselement 940 and a fifth lens element 950 is T45, and the axial distancebetween the fifth lens element 950 and the sixth lens element 960 isT56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 9th embodiment are shown in TABLE 17and the aspheric surface data are shown in TABLE 18 below.

TABLE 17 9th Embodiment f = 5.39 mm, Fno = 2.40, HFOV = 20.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Lens 1 1.573 ASP 0.701 Plastic 1.544 55.9 3.18 214.442 ASP 0.030 3 Ape. Stop Plano 0.035 4 Lens 2 20.523 ASP 0.230Plastic 1.640 23.3 −5.10 5 2.801 ASP 0.205 6 Lens 3 4.656 ASP 0.627Plastic 1.544 55.9 15.14 7 10.200 ASP 0.369 8 Lens 4 −2.203 ASP 0.312Plastic 1.640 23.3 26.29 9 −2.056 ASP 0.020 10 Lens 5 3.015 ASP 0.423Plastic 1.544 55.9 −18.06 11 2.193 ASP 1.342 12 Lens 6 −3.362 ASP 0.335Plastic 1.544 55.9 −8.36 13 −13.323 ASP 0.300 14 IR-cut filter Plano0.248 Glass 1.517 64.2 — 15 Plano 0.284 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 18 Aspheric Coefficients Surface # 1 2 4 5 6 7 k=  1.5938E−01−1.0000E+00  5.0000E+01 −1.7368E+01  −1.0000E+00 −1.7905E+01 A4=−3.0064E−03 −8.5161E−02 −1.8340E−01 −8.1730E−02  −1.3796E−01 −5.6314E−02A6= −1.1847E−02  1.3785E−01  3.5461E−01 2.0355E−01  2.2564E−02−5.6031E−02 A8=  4.3493E−02 −5.1007E−02 −2.9619E−01 −2.0253E−01 −3.6063E−02  2.5376E−02 A10= −8.7587E−02 −1.6474E−01 −3.0832E−037.5013E−02  3.9396E−02  6.8390E−03 A12=  7.9586E−02  1.8818E−01 1.6181E−01 4.1353E−02 −1.5963E−02 −1.9731E−02 A14= −3.1141E−02−6.0328E−02 −6.3255E−02 4.8036E−03  2.3924E−02  7.9007E−03 Surface # 8 910 11 12 13 k= −5.7047E−02 2.2861E−01 −2.9176E+01 −1.6780E+01−2.1700E+00  4.7066E+01 A4=  2.0650E−01 1.2002E−01 −2.0159E−01−9.6619E−02 −8.6852E−02  −6.9360E−02  A6= −4.3862E−01 −1.7839E−01  7.2189E−02  1.5125E−02 7.0946E−03 6.9570E−03 A8=  4.4203E−01 1.3955E−01−3.5580E−02  2.5022E−02 −5.4877E−03  −2.7817E−03  A10= −3.7871E−01−9.1401E−02   2.6949E−02 −1.5739E−02 2.8245E−04 4.0376E−04 A12= 1.2956E−01 2.1203E−02 −1.7776E−03  6.5065E−03 4.5206E−04 6.1874E−05A14= −1.6345E−02 4.2147E−04 −8.0824E−03 −1.4646E−03 4.2584E−05−3.0979E−05 

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 17 and TABLE 18as the following values and satisfy the following conditions:

9th Embodiment f (mm) 5.39 f/ImgH 2.69 Fno 2.40 f12/f3456 −0.30 HFOV(deg.) 20.0 Y11/Y62 0.72 V4 23.3 SAG62 + CT6 (mm) −0.24 Nmax 1.640(ΣCT + ΣAT)/SD 1.19 CT6/T12 5.15 (ΣCT + ΣAT)/ΣCT 1.76 T56/CTmax 1.91TL/f 1.01 f/R1 3.42 TL/ImgH 2.73

10th Embodiment

FIG. 19 is a schematic view of an imaging apparatus according to the10th embodiment of the present disclosure. FIG. 20 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the imaging apparatus according to the 10thembodiment.

In FIG. 19, the imaging apparatus includes the imaging optical lensassembly (its reference numeral is omitted) and an image sensor 1090.The imaging optical lens assembly includes, in order from an object sideto an image side, an aperture stop 1000, a first lens element 1010, asecond lens element 1020, a third lens element 1030, a fourth lenselement 1040, a fifth lens element 1050, a sixth lens element 1060, anIR-cut filter 1070 and an image surface 1080. The image sensor 1090 isdisposed on the image surface 1080 of the imaging optical lens assembly.The imaging optical lens assembly has a total of six lens elements(1010-1060) with refractive power. Moreover, there is an air gap betweenany two of the first lens element 1010, the second lens element 1020,the third lens element 1030, the fourth lens element 1040, the fifthlens element 1050, and the sixth lens element 1060 that are adjacent toeach other and there is no relative movement among the lens elements(1010-1060) with refractive power.

The first lens element 1010 with positive refractive power has a convexobject-side surface 1011 and a convex image-side surface 1012. The firstlens element 1010 is made of plastic material and has both theobject-side surface 1011 and the image-side surface 1012 being aspheric.

The second lens element 1020 with negative refractive power has aconcave object-side surface 1021 and a concave image-side surface 1022.The second lens element 1020 is made of plastic material and has boththe object-side surface 1021 and the image-side surface 1022 beingaspheric.

The third lens element 1030 with negative refractive power has a concaveobject-side surface 1031 and a convex image-side surface 1032. The thirdlens element 1030 is made of plastic material and has both theobject-side surface 1031 and the image-side surface 1032 being aspheric.

The fourth lens element 1040 with positive refractive power has aconcave object-side surface 1041 and a convex image-side surface 1042.The fourth lens element 1040 is made of plastic material and has boththe object-side surface 1041 and the image-side surface 1042 beingaspheric.

The fifth lens element 1050 with positive refractive power has a convexobject-side surface 1051 and a concave image-side surface 1052. Thefifth lens element 1050 is made of plastic material and has both theobject-side surface 1051 and the image-side surface 1052 being aspheric.Furthermore, both of the object-side surface 1051 and the image-sidesurface 1052 of the fifth lens element 1050 have at least one inflectionpoint. The object-side surface 1051 of the fifth lens element 1050changes from a convex shape to a concave shape from a paraxial regionthereof to an off-axis region thereof.

The sixth lens element 1060 with negative refractive power has a concaveobject-side surface 1061 and a concave image-side surface 1062. Thesixth lens element 1060 is made of plastic material and has both theobject-side surface 1061 and the image-side surface 1062 being aspheric.Furthermore, the image-side surface 1062 of the sixth lens element 1060has at least one inflection point.

The IR-cut filter 1070 is made of glass material and located between thesixth lens element 1060 and the image surface 1080, and will not affectthe focal length of the imaging optical lens assembly.

Furthermore, in the imaging optical lens assembly of the imagingapparatus according to the 10th embodiment, when an Abbe number of thefirst lens element 1010 is V1, an Abbe number of the second lens element1020 is V2, an Abbe number of the third lens element 1030 is V3, theAbbe number of the fourth lens element 1040 is V4, an Abbe number of thefifth lens element 1050 is V5, and an Abbe number of the sixth lenselement 1060 is V6, three (V2=23.3, V4=23.3 and V6=23.3) of V1, V2, V3,V4, V5 and V6 are smaller than 27.

In the imaging optical lens assembly of the imaging apparatus accordingto the 10th embodiment, when an axial distance between the first lenselement 1010 and the second lens element 1020 is T12, an axial distancebetween the second lens element 1020 and the third lens element 1030 isT23, an axial distance between the third lens element 1030 and thefourth lens element 1040 is T34, an axial distance between the fourthlens element 1040 and a fifth lens element 1050 is T45, and the axialdistance between the fifth lens element 1050 and the sixth lens element1060 is T56, the following conditions are satisfied: 0<T12<T23<T56;0<T12<T34<T56; 0<T45<T23<T56; and 0<T45<T34<T56.

The detailed optical data of the 10th embodiment are shown in TABLE 19and the aspheric surface data are shown in TABLE 20 below.

TABLE 19 10th Embodiment f = 4.85 mm, Fno = 2.40, HFOV = 22.0 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.316  2 Lens 1 1.741 ASP 0.616Plastic 1.544 55.9 2.99 3 −22.152 ASP 0.094 4 Lens 2 −30.338 ASP 0.245Plastic 1.640 23.3 −6.25 5 4.620 ASP 0.489 6 Lens 3 −9.153 ASP 0.470Plastic 1.544 55.9 −89.68 7 −11.470 ASP 0.701 8 Lens 4 −1.429 ASP 0.261Plastic 1.640 23.3 134.16 9 −1.506 ASP 0.020 10 Lens 5 2.507 ASP 0.608Plastic 1.544 55.9 10.39 11 4.119 ASP 0.919 12 Lens 6 −2.966 ASP 0.349Plastic 1.640 23.3 −4.30 13 40.023 ASP 0.250 14 IR-cut filter Plano0.248 Glass 1.517 64.2 — 15 Plano 0.196 16 Image Plano — Note: Referencewavelength is 587.6 nm (d-line).

TABLE 20 Aspheric Coefficients Surface # 2 3 4 5 6 7 k= 1.9874E−01−1.0000E+00 −5.0000E+01 −3.0729E+01 −1.0000E+00 −2.6703E+01 A4=1.6992E−03 −8.6921E−02 −1.8580E−01 −8.2305E−02 −1.1346E−01 −5.7516E−02A6= −8.6575E−03   1.4011E−01  3.6387E−01  2.2441E−01 −2.4580E−02−4.6890E−02 A8= 3.9198E−02 −4.3001E−02 −2.8759E−01 −1.8975E−01−3.7457E−03  9.3117E−03 A10= −8.4097E−02  −1.5868E−01  5.5728E−03 6.8894E−02  3.7163E−02  3.1640E−03 A12= 8.1967E−02  1.9121E−01 1.6116E−01  3.7131E−02 −7.5224E−02 −4.5081E−03 A14= −3.6456E−02 −7.1793E−02 −7.3135E−02 −6.0985E−03  5.3857E−02  3.0069E−03 Surface # 89 10 11 12 13 k= −2.9843E+00 −1.8604E−01 −1.1315E+01 −3.5618E+01−1.2753E+01 5.0000E+01 A4=  2.4193E−01  1.4465E−01 −1.6690E−01−4.7542E−02 −5.9500E−02 −3.5320E−02  A6= −4.8839E−01 −1.6127E−01 1.1230E−01 −2.4636E−03  2.5898E−02 9.7534E−03 A8=  4.7021E−01 1.3110E−01 −5.1886E−02  2.8646E−02 −2.4445E−03 −1.9535E−03  A10=−3.3811E−01 −8.3386E−02  1.1427E−02 −1.9560E−02 −3.5334E−04 3.1454E−04A12=  1.3801E−01  3.1585E−02 −1.8534E−03  4.4047E−03 −9.1457E−05−7.1451E−05  A14= −2.2905E−02 −4.7021E−03 −5.0751E−04 −3.4496E−04−1.9867E−05 4.4475E−06

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 19 and TABLE 20as the following values and satisfy the following conditions:

10th Embodiment f (mm) 4.85 f/ImgH 2.43 Fno 2.40 f12/f3456 −0.53 HFOV(deg.) 22.0 Y11/Y62 0.58 V4 23.3 SAG62 + CT6 (mm) 0.20 Nmax 1.640 (ΣGT +ΣAT)/SD 1.07 CT6/T12 3.71 (ΣCT + ΣAT)/ΣCT 1.87 T56/CTmax 1.49 TL/f 1.13f/R1 2.79 TL/ImgH 2.73

11th Embodiment

FIG. 22 is a schematic view of an electronic device 10 according to the11th embodiment of the present disclosure. The electronic device 10 ofthe 11th embodiment is a smart phone, wherein the electronic device 10includes an imaging apparatus 11. The imaging apparatus 11 includes animaging optical lens assembly (its reference numeral is omitted)according to the present disclosure and an image sensor (its referencenumeral is omitted), wherein the image sensor is disposed on an imagesurface of the imaging optical lens assembly.

12th Embodiment

FIG. 23 is a schematic view of an electronic device 20 according to the12th embodiment of the present disclosure. The electronic device 20 ofthe 12th embodiment is a tablet personal computer, wherein theelectronic device 20 includes an imaging apparatus 21. The imagingapparatus 21 includes an imaging optical lens assembly (its referencenumeral is omitted) according to the present disclosure and an imagesensor (its reference numeral is omitted), wherein the image sensor isdisposed on an image surface of the imaging optical lens assembly.

13th Embodiment

FIG. 24 is a schematic view of an electronic device 30 according to the13th embodiment of the present disclosure. The electronic device 30 ofthe 13th embodiment is a head-mounted display, wherein the electronicdevice 30 includes an imaging apparatus 31. The imaging apparatus 31includes an imaging optical lens assembly (its reference numeral isomitted) according to the present disclosure and an image sensor (itsreference numeral is omitted), wherein the image sensor is disposed onan image surface of the imaging optical lens assembly.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-20 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An imaging optical lens assembly comprising sixlens elements, the six lens elements being, in order from an object sideto an image side: a first lens element, a second lens element, a thirdlens element, a fourth lens element, a fifth lens elements and a sixthlens element; wherein each of the six lens elements has an object-sidesurface facing towards the object side and an image-side surface facingtowards the image side; wherein the fifth lens element has negativerefractive power, at least one of the fifth lens element and the sixthlens element has at least one inflection point; wherein an Abbe numberof the first lens element is V1, an Abbe number of the second lenselement is V2, an Abbe number of the third lens element is V3, an Abbenumber of the fourth lens element is V4, an Abbe number of the fifthlens element is V5, an Abbe number of the sixth lens element is V6, andat least two of V1, V2, V3, V4, V5 and V6 are smaller than 27; whereinan axial distance between the object-side surface of the first lenselement and an image surface is TL, a focal length of the imagingoptical lens assembly is f, a half of a maximal field of view of theimaging optical lens assembly is HFOV, and the following conditions aresatisfied:0.70<TL/f<1.05; and7.5 degrees<HFOV<23.5 degrees.
 2. The imaging optical lens assembly ofclaim 1, wherein the half of a maximal field of view of the imagingoptical lens assembly is HFOV, and the following condition is satisfied:7.5 degrees<HFOV≤20.0 degrees.
 3. The imaging optical lens assembly ofclaim 2, wherein the first lens element with positive refractive powerhas the object-side surface being convex in a paraxial region thereof,the focal length of the imaging optical lens assembly is f, a curvatureradius of the object-side surface of the first lens element is R1, andthe following condition is satisfied:3.0<f/R1.
 4. The imaging optical lens assembly of claim 2, wherein thesecond lens element has the object-side surface being convex in aparaxial region thereof, a refractive index of the first lens element isN1, a refractive index of the second lens element is N2, a refractiveindex of the third lens element is N3, a refractive index of the fourthlens element is N4, a refractive index of the fifth lens element is N5,a refractive index of the sixth lens element is N6, a maximum valueamong N1, N2, N3, N4, N5 and N6 is Nmax, and the following condition issatisfied:Nmax<1.70.
 5. The imaging optical lens assembly of claim 1, wherein thehalf of a maximal field of view of the imaging optical lens assembly isHFOV, and the following condition is satisfied:7.5 degrees<HFOV≤18.5 degrees.
 6. The imaging optical lens assembly ofclaim 1, wherein the second lens element with negative refractive powerhas the image-side surface being concave in a paraxial region thereof,at least four of the six lens elements are made of plastic material. 7.The imaging optical lens assembly of claim 6, wherein the third lenselement has the object-side surface being convex in a paraxial regionthereof and the image-side surface being concave in a paraxial regionthereof.
 8. The imaging optical lens assembly of claim 6, wherein thereis no relative movement among the six lens elements, there is an air gapbetween each of adjacent lens elements of the six lens elements, thefocal length of the imaging optical lens assembly is f, a maximum imageheight of the imaging optical lens assembly is ImgH, and the followingcondition is satisfied:2.0<f/ImgH.
 9. The imaging optical lens assembly of claim 1, wherein theaxial distance between the object-side surface of the first lens elementand the image surface is TL, a maximum image height of the imagingoptical lens assembly is ImgH, a sum of central thicknesses of the sixlens elements is ΣCT, a sum of all axial distances between adjacent lenselements of the six lens elements is ΣAT, the imaging optical lensassembly further comprises an aperture stop, an axial distance betweenthe aperture stop and the image-side surface of the sixth lens elementis SD, and the following conditions are satisfied:0.90<(ΣCT+ΣAT)/SD<1.20; and2.0<TL/ImgH<3.0.
 10. The imaging optical lens assembly of claim 1,wherein the fifth lens element has the image-side surface being concavein a paraxial region thereof.
 11. The imaging optical lens assembly ofclaim 1, wherein the Abbe number of the first lens element is V1, theAbbe number of the second lens element is V2, the Abbe number of thethird lens element is V3, the Abbe number of the fourth lens element isV4, the Abbe number of the fifth lens element is V5, the Abbe number ofthe sixth lens element is V6, and at least two of V1, V2, V3, V4, V5 andV6 are equal to or smaller than 23.3.
 12. The imaging optical lensassembly of claim 1, wherein the Abbe number of the first lens elementis V1, the Abbe number of the second lens element is V2, the Abbe numberof the third lens element is V3, the Abbe number of the fourth lenselement is V4, the Abbe number of the fifth lens element is V5, the Abbenumber of the sixth lens element is V6, and at least two of V1, V2, V3,V4, V5 and V6 are equal to or smaller than 21.4.
 13. The imaging opticallens assembly of claim 1, wherein an axial distance between the fifthlens element and the sixth lens element is a maximum among axialdistances between adjacent lens elements of the six lens elements. 14.An imaging optical lens assembly comprising six lens elements, the sixlens element being, in order from an object side to an image side: afirst lens element, a second lens element, a third element, a fourthlens element, a fifth lens element and a sixth lens element; whereineach of the six lens elements has an object-side surface facing towardsthe object side and an image-side surface facing towards the image side;wherein the second lens element has negative refractive power, the sixthlens element has positive refractive power, at least one of the fifthlens element and the sixth lens element has at least one inflectionpoint; wherein an Abbe number of the first lens element is V1, an Abbenumber of the second lens element is V2, an Abbe number of the thirdlens element is V3, an Abbe number of the fourth lens element is V4, anAbbe number of the fifth lens element is V5, an Abbe number of the sixthlens element is V6, and at least two of V1, V2, V3, V4, V5, and V6 aresmaller than 27; wherein an axial distance between the object-sidesurface of the first lens element and an image surface is TL, a focallength of the imaging optical lens assembly is f, and the followingcondition is satisfied:0.70<TL/f<1.05.
 15. The imaging optical lens assembly of claim 14,wherein the first lens element with positive refractive power has theobject-side surface being convex in a paraxial region thereof, thesecond lens element has the image-side surface being concave in aparaxial region thereof, the focal length of the imaging optical lensassembly is f, a curvature radius of the object-side surface of thefirst lens element is R1, and the following condition is satisfied:3.0<f/R1.
 16. The imaging optical lens assembly of claim 14, wherein thefourth lens element has negative refractive power, the axial distancebetween the object-side surface of the first lens element and the imagesurface is TL, the focal length of the imaging optical lens assembly isf, and the following condition is satisfied:0.70<TL/f<1.0.
 17. The imaging optical lens assembly of claim 14,wherein the fifth lens element has the image-side surface being concavein a paraxial region thereof.
 18. The imaging optical lens assembly ofclaim 14, wherein the sixth lens element has the image-side surfacebeing convex in a paraxial region thereof, there is an air gap betweeneach of adjacent lens elements of the six lens elements.
 19. The imagingoptical lens assembly of claim 14, wherein the axial distance betweenthe object-side surface of the first lens element and the image surfaceis TL, a maximum image height of the imaging optical lens assembly isImgH, a half of a maximal field of view of the imaging optical lensassembly is HFOV, and the following conditions are satisfied:2.0<TL/ImgH<3.0; and7.5 degrees<HFOV<23.5 degrees.
 20. An imaging optical lens assemblycomprising six lens elements, the six lens elements being, in order froman object side to an image side: a first lens element, a second lenselement, a third lens element, a fourth lens element, a fifth lenselement and a sixth lens element; wherein each of the six lens elementshas an object-side surface facing towards the object side and animage-side surface facing towards the image side; wherein at least oneof the fifth lens element and the sixth lens element has at least oneinflection point; wherein an Abbe number of the first lens element isV1, an Abbe number of the second lens element is V2, an Abbe number ofthe third lens element is V3, an Abbe number of the fourth lens elementis V4, an Abbe number of the fifth lens element is V5, an Abbe number ofthe sixth lens element is V6, and at least two of V1, V2, V3, V4, V5 andV6 are equal to or smaller than 23.3; wherein an axial distance betweenthe object-side surface of the first lens element and an image surfaceis TL, a focal length of the imaging optical lens assembly is f, a halfof a maximal field of view of the imaging optical lens assembly is HFOV,and the following conditions are satisfied:0.70<TL/f<1.05; and7.5 degrees<HFOV<23.5 degrees.
 21. The imaging optical lens assembly ofclaim 20, wherein the second lens element with negative refractive powerhas the image-side surface being concave in a paraxial region thereof.22. The imaging optical lens assembly of claim 21, wherein the secondlens element has the object-side surface being convex in a paraxialregion thereof, the axial distance between the object-side surface ofthe first lens element and the image surface is TL, the focal length ofthe imaging optical lens assembly is f, and the following condition issatisfied:0.70<TL/f<1.0.
 23. The imaging optical lens assembly of claim 20,wherein the half of a maximal field of view of the imaging optical lensassembly is HFOV, and the following condition is satisfied:7.5 degrees<HFOV≤20.0 degrees.
 24. The imaging optical lens assembly ofclaim 23, wherein a maximum effective radius of the object-side surfaceof the first lens element is Y11, a maximum effective radius of theimage-side surface of the sixth lens element is Y62, and the followingcondition is satisfied:0.50<Y11/Y62<0.80.
 25. The imaging optical lens assembly of claim 20,wherein the Abbe number of the first lens element is V1, the Abbe numberof the second lens element is V2, the Abbe number of the third lenselement is V3, the Abbe number of the fourth lens element is V4, theAbbe number of the fifth lens element is V5, the Abbe number of thesixth lens element is V6, and at least two of V1, V2, V3, V4, V5 and V6are equal to or smaller than 21.4.
 26. The imaging optical lens assemblyof claim 25, wherein the first lens element with positive refractivepower has the object-side surface being convex in a paraxial regionthereof, the focal length of the imaging optical lens assembly is f, acurvature radius of the object-side surface of the first lens element isR1, and the following condition is satisfied:3.0<f/R1.
 27. The imaging optical lens assembly of claim 20, wherein thesixth lens element has the image-side surface being convex in a paraxialregion thereof, there is an air gap between each of adjacent lenselements of the six lens elements.
 28. The imaging optical lens assemblyof claim 20, wherein the fifth lens element has the image-side surfacebeing concave in a paraxial region thereof, the axial distance betweenthe object-side surface of the first lens element and the image surfaceis TL, a maximum image height of the imaging optical lens assembly isImgH, and the following condition is satisfied:2.0<TL/ImgH<3.0.
 29. The imaging optical lens assembly of claim 20,wherein an axial distance between the fifth lens element and the sixthlens element is a maximum among axial distances between adjacent lenselements of the six lens elements.
 30. The imaging optical lens assemblyof claim 20, wherein a central thickness of the first lens element is amaximum of central thicknesses of the six lens elements.
 31. An imagingapparatus, comprising: the imaging optical lens assembly of claim 20;and an image sensor disposed on the image surface of the imaging opticallens assembly.
 32. An electronic device, comprising: the imagingapparatus of claim 31.